develop a forum in Silverlight (c#)

greeting, I would like to developper a Forum of exchange in Silverlight (c#), but it is necessary to say that I am new in this nice technology and I do not know how to arrive at it (but I know basic notions), however, I must deposit this
application there in two weeks
I would like therefore that you help me this plan has start by pointing to me out the link of a source code (of forum) already usable on CodPlex or by pointing to me out the link of a tuto who few to help me to accomplish ( develop) a Forum in Silverlight,
or others.
Thank you for your Assistant!